I used to ride a Felt TK2, which has traditional sprint geometry, and I actually hated how it responded sometimes. I wouldn't really be able to describe it - it's been a few years - but while I liked the nimbleness of a steep headtube there was something else I didn't like.
When I replaced the TK2 with a Langster Pro, the LP's 73deg headtube and 45mm fork struck me as "not right" - even though the trail measurement winds up being a totally reasonable number, like 56 or 57 IIRC. I did some poking around looking for a 35 or 40mm fork to use on it. And then I rode it, and I realized that I did not need to buy a different fork for it. I've done pursuits, team pursuits, keirins, very fast mass start races, dove down 43deg bankings on it, finally got my flying 200 into the elevens, and the bike does what I need it to do.